CN101635464A - Magnetic control transient reactive power compensation method - Google Patents
Magnetic control transient reactive power compensation method Download PDFInfo
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- CN101635464A CN101635464A CN200910170032A CN200910170032A CN101635464A CN 101635464 A CN101635464 A CN 101635464A CN 200910170032 A CN200910170032 A CN 200910170032A CN 200910170032 A CN200910170032 A CN 200910170032A CN 101635464 A CN101635464 A CN 101635464A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a magnetic control transient reactive power compensation method which is used for regulating the capacity current of an injection system of a capacitor based on reliably and flexibly controlling the resistance value of a magneto resistor. The method comprises the steps of data collection, parameter computation and the regulation of the resistance value of the resistor: obtaining reactive power capacity to be compensated by computing the power factor of an integral power supply system; firstly putting a capacitor group of fixed capacity for primary compensation; then further analyzing the reactive power capacity to be compensated; executing secondary transient dynamic regulation by a regulable capacitor group; realizing the regulable capacitor group by connecting the magneto resistor with the capacitor in series; controlling the resistance value of the magneto resistor by penetrating the magnetic field of the magneto resistor ,wherein the direction of a magnetic line is consistent with that of current flowing in the magneto resistor. A changeable magnetic field is produced by regulating the direct current of a coil by a central processor. The resistance value of the magneto resistor in the changeable magnetic field is changed because of a giant magnetic effect. In this way, the size of the reactive power current of the injection system can be regulated, thereby accurately and transiently regulating the power factor of the system. Simultaneously, because the capacitor and the magneto resistor are both linear elements, no harmonic wave is produced.
Description
Technical field:
The present invention relates to a kind of reactive-load compensation method at once, be applicable to each electric pressure of present electric power system, belong to the electric power quality field.
Background technology:
Reactive power compensation is to improve the electricity consumption power-factor of load, and reactive current causes an important power save mode of loss in the minimizing electric energy transmitting, and traditional reactive compensation system is mainly by power capacitor, and the electric power Power Factor Controller resists the reactor that shoves to form.Its shortcoming is: can not realize the adjusting of power factor continuous controllable.Dynamic reactive compensation device (MCR) has appearred again recent years, present dynamic reactive compensation device mainly passes through Regulatable reactor in parallel on the line and absorbs the idle of overcompensation, and its implementation has three: 1, adopts the controlled reactor of adjustable air gap, there is harmonic wave in shortcoming for regulating slowly.2 adopt D.C. magnetic biasing formula Regulatable reactor, because the saturated phenomenon of core material, this reactor triple-frequency harmonics content surpasses 30%, is suitable for hardly in reality.3 adopt the mode of regulating tap to regulate the controlled inductance inductance value, and this mode is regulated too slow, this controlled inductance damage probability height of while, cost costliness.By above analysis as can be known, the reactive power compensator that exists the at present power factor of regulating system fast.
Last century Mo, two scientists of moral method of making of discovery of giant magnetoresistance obtained the Nobel Prize in 2007, had also opened the application of magnetoresistor in reality simultaneously, and this present series products is called mistor substantially.The appearance of mistor makes that (this magnetic field must be consistent with the resistance two ends in the magnetic field that the resistance of resistance can be by the resistance region, magnetic direction is vertical with the resistor current direction then can not to produce giant magnetic effect) transient change regulates immediately, this mistor is applied to just can realizes the continuous instantaneous adjustable of power factor in the reactive power compensator, because resistance and electric capacity are all linear unit,, the power factor that the mode by adjusting mistor resistance realizes do not have the generation harmonic problem so regulating at once.
Summary of the invention:
The purpose of this invention is to provide the continuous at once adjustable system of a kind of electric power system power factor without any side effects, by regulating the size of the mistor resistance that is cascaded with compensation condenser, thereby regulate the size of injecting the electrical network capacity current, the continuous power factor of regulating system fast.
The present invention includes the capacitor group of fixed capacity, regulate and use capacitor group, controllable electric power and center processor.Fixed capacity capacitor group is used for compensating the fixed qty reactive power; The regulating capacitor group is used for compensating the reactive power of dynamic change, and the adjusting of size of current is regulated by mistor, is added in magnetic field intensity on the mistor by change, and resistance value changes thereupon, and the electric current that flows through also changes thereupon; Controllable electric power comprises three the tunnel, gives A respectively, B, the adjustable mistor excitation with capacitances in series of C three-phase.Center processor receives the three-phase voltage current signal, be responsible for the calculating of system power factor, power factor numerical value by analytical system, voltage magnitude, size of current, thereby determine the required additional reactive capability of system, behind the required reactive capability of definite system, but quantity according to fixed capacity capacitor group compensating power, determine to need to drop into the quantity of fixed capacity capacitor group, after the capacitor group of fixed capacity was dropped into, the reactive capability that remaining needs replenish was finished with the capacitor group by regulating.By the data that center processor has been stored, adjust the direct current of controllable electric power output, control resistance by the magnetic field of passing mistor, realize the reliable of system's reactive capability precisely replenished.After regulating capacitor dropped into, master controller was measured the power factor of system at once, if do not reach requirement, then continued to regulate the mistor resistance, arrived error up to power factor and allowed requirement.
The computing formula of power factor is:
Q＝U
a*I
a*sinθ
a+U
b*I
b*sinθ
b+U
c*I
c*sinθ
c
In system with non effectively earth ed neutral, as Fig. 1, the capacitor set of connections is a star structure, adopts three-phase to unify compensation way, and the reactive capability that has both needed to replenish need replenish the reactive capability sum for system's three-phase.The capacity of removing with fixed capacity capacitor group with total capacity decides the quantity that needs input then.Residue need to be replenished reactive capability and is then finished by variable capacity capacitor group, and the dynamic adjustments process need calculates three-phase respectively and needs the compensating reactive power capacity, determines the resistance that needs with this, thereby reaches fine compensation.
In system with effectively earthed neutral, as Fig. 2, because three-phase all can constitute compensation circuit with ground, three-phase can compensate respectively, and three-phase needs to calculate respectively the additional capacity that needs:
Q
a＝U
a*I
a*sinθ
a
Q
b＝U
b*I
b*sinθ
b
Q
c＝U
c*I
c*sinθ
c
The capacity of three-phase is respectively divided by the fixed capacitor pool-size of this phase, thereby the reactive capability that obtains the quantity of this fixed capacity capacitor group that need drop into mutually and need in addition to compensate, need the capacity of compensation just can obtain the direct current that the mistor excitation needs in addition by this part, thereby realize fine compensation.
The variation of mistor resistance adopts direct current to produce magnetic field by parallel magnetic field control of passing it.Whole controllable resistor is made up of three parts: resistance, iron core, coil.As Fig. 3,,, change exciting current and just can change resistance value just can obtain passing the magnetic line of force of resistance by on coil, adding the DC excitation electric current.
Description of drawings:
Fig. 1 is a system with non effectively earth ed neutral reactive power compensation schematic diagram:
1: the capacitor group 2 of fixed capacity: regulate with the mutually controlled mistor 6 of the mutually controlled mistor 5:C of the mutually controlled mistor 4:B of capacitor group 3:A: controllable electric power 7: center processor
Fig. 2 is a solidly earthed neutral system reactive power compensation schematic diagram: 1: the capacitor group 2 of fixed capacity: regulate and use the capacitor group
The mutually controlled mistor 6 of the mutually controlled mistor 5:C of the mutually controlled mistor 4:B of 3:A: controllable electric power 7: center processor
Fig. 3 is the controllable resistor schematic diagram that comprises energized circuit: 1: resistance 2: coil 3: magnet
Embodiment:
Now provide preferred forms in conjunction with the accompanying drawings:
Preferred forms 1:
In conjunction with Fig. 1, provide system with non effectively earth ed neutral reactive capability additional project at once: three-phase voltage and the electric current in center processor 7 acquisition systems at first, the reactive capability that the system of calculating need compensate (Q), then with the capacity round numbers (N) of Q divided by the capacitor group 1 of fixed capacity, in system, drop into the capacitor of N group fixed capacity then, and then the reactive capability that needs compensate analyzed, thereby decision is regulated with capacitor group 2 each excitation that need mutually, then exciting current is fed, drop into and regulate with capacitor group 2.
Optimum implementation 2:
Provide solidly earthed neutral system transient state reactive power compensation scheme in conjunction with Fig. 2, in this scheme, adopt three-phase compensation way respectively, now illustrate as an example mutually with A, at first center processor 7 calculates A by A phase voltage and electric current needs the reactive capability (Q) that compensates mutually, use the capacity of Q then divided by the capacitor group 1A phase of fixed capacity, draw the quantity of the fixed capacity capacitor group that needs input, after the input, again the reactive capability of needs compensation is analyzed, determine to regulate the exciting current that needs with capacitor group 2, drop into then.
Claims (3)
1, a kind of magnetic control transient reactive power compensation method, based on reliable control flexibly to the mistor resistance, it is characterized in that: by calculating the power factor of whole electric power system, the reactive capability that needs compensation, at first drop into the capacitor group of fixed capacity, carry out single compensation, then the reactive capability of needs compensation is further analyzed, carry out secondary moment dynamic adjustments by the adjustable condenser group, the adjustable condenser group realizes that by mistor and capacitors in series the resistance of mistor can be controlled by the magnetic field of passing it, and the sense of current that flows through in the magnetic line of force of this moment and the resistance is consistent.Variable magnetic field is regulated by the direct current of coil by center processor and is realized, because giant magnetic effect, mistor resistance in the magnetic field that changes changes thereupon, like this, just can regulate the size of current of the idle character of injected system.
2, flexible control according to the described mistor resistance of claim 1, be meant: in system with non effectively earth ed neutral, because the three-phase compensation is interrelated, A, B, C three phase dynamic offset current is by the center processor integrated treatment, dynamic adjustments of three-phase is regulated to adopt in the programmed algorithm and is approached fast algorithm one by one, realizes accurately regulating; In solidly earthed neutral system, the three-phase separate computations adopts single-phase disposable dynamic compensation, does not adopt successive approximation algorithm.
3, according to the flexible control of the described mistor resistance of claim 1, the principle that is adopted is a giant magnetoresistance effect.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910170032A CN101635464A (en) | 2009-09-01 | 2009-09-01 | Magnetic control transient reactive power compensation method |
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| CN200910170032A CN101635464A (en) | 2009-09-01 | 2009-09-01 | Magnetic control transient reactive power compensation method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664419A (en) * | 2012-05-16 | 2012-09-12 | 云南电网公司北京能源新技术研究发展中心 | Capacity-adjustable parallel compensating capacitor |
| CN107039986A (en) * | 2017-03-13 | 2017-08-11 | 国网山东省电力公司淄博供电公司 | A kind of continuous quick compensator of reactive power |
| CN108091975A (en) * | 2017-12-12 | 2018-05-29 | 广东曼克维通信科技有限公司 | Wave filter and its integrated form magnetic turnable resonator device |
| CN111313433A (en) * | 2020-04-11 | 2020-06-19 | 温州市森脉电力设备有限公司 | Reactive power compensation device for power equipment |
| CN115051379A (en) * | 2022-08-17 | 2022-09-13 | 山东国信电力科技有限公司 | Reactive compensation system and compensation method for power distribution network |
-
2009
- 2009-09-01 CN CN200910170032A patent/CN101635464A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664419A (en) * | 2012-05-16 | 2012-09-12 | 云南电网公司北京能源新技术研究发展中心 | Capacity-adjustable parallel compensating capacitor |
| CN107039986A (en) * | 2017-03-13 | 2017-08-11 | 国网山东省电力公司淄博供电公司 | A kind of continuous quick compensator of reactive power |
| CN107039986B (en) * | 2017-03-13 | 2020-03-17 | 国网山东省电力公司淄博供电公司 | Reactive power continuous rapid compensation device |
| CN108091975A (en) * | 2017-12-12 | 2018-05-29 | 广东曼克维通信科技有限公司 | Wave filter and its integrated form magnetic turnable resonator device |
| CN111313433A (en) * | 2020-04-11 | 2020-06-19 | 温州市森脉电力设备有限公司 | Reactive power compensation device for power equipment |
| CN115051379A (en) * | 2022-08-17 | 2022-09-13 | 山东国信电力科技有限公司 | Reactive compensation system and compensation method for power distribution network |
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